The jagged edges of what's commonly referred to as lunar regolith, can create some serious issues when it comes to critical things for living on the moon, like keeping airlock seals tight or not ripping apart the lungs of astronauts. This stuff's not all bad. If we can find a way to mine and collect the regolith we can utilize it to help build our future lunar colonies. We can possibly use it to provide shielding from meteorites, thermal extremes, radiation, both natural and man-made, and the blast effects of rockets landing and taking off. Oh, and the material contains He-3 which could, you know, solve the world's energy crisis.